Jardim Botanico
Dom João VI, by royal decree, ordered the creation of this botanic garden in 1808. About 5000 tropical species are on view, including a beautiful orchid museum. Do not miss the Amazon section, with a 1km long walk way bordered with giant palm trees and stunning large Vitoria Regia water lilies.
You can try to book a guided tour if you want to get more insight in the botanic garden.